Portion of a burner



FIG. 1 is a front, top, left perspective view of a portion of a burnershowing our new design;

FIG. 2 is a front elevational view thereof, a rear elevational viewthereof being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a right side elevational view thereof.

The portions shown as broken lines are for illustrative purposes onlyand form no part of the claimed design.

The ornamental design for a portion of a burner, as shown and described.